Crossword Genius

Schoolboy son Baltic citizen expels (7)

Ross

I believe the answer is:

etonian

I'm a little stuck... Click here to teach me more about this clue!

'schoolboy' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for etonian that I've seen before include "Public schoolboy" , "student in establishment?" , "Relating to one particular school" , "Public school boy" , "Alumnus of famous English school" .)

I've seen this clue in The Sun and The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.